Light yield non-proportionality and energy resolution of Lu1.95Y0.05SiO5:Ce and Lu2SiO5:Ce scintillation crystals | Zendy

Chalerm Wanarak | Zendy; Weerapong Chewpraditkul | Zendy; Akapong Phunpueok | Zendy

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Light yield non-proportionality and energy resolution of Lu1.95Y0.05SiO5:Ce and Lu2SiO5:Ce scintillation crystals

Author(s) -

Chalerm Wanarak,

Weerapong Chewpraditkul,

Akapong Phunpueok

Publication year - 2012

Publication title -

procedia engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.32

H-Index - 74

ISSN - 1877-7058

DOI - 10.1016/j.proeng.2012.02.010

Subject(s) - lyso , lutetium , scintillation , materials science , yttrium , scintillator , analytical chemistry (journal) , crystal (programming language) , yield (engineering) , resolution (logic) , photomultiplier , optics , chemistry , physics , detector , chromatography , artificial intelligence , computer science , metallurgy , programming language , oxide

The scintillation response of the new Ce-doped lutetium-yttrium oxyorthosilicate (Lu1.95Y0.05SiO5:Ce, LYSO:Ce) crystal was investigated and compared to that of Ce-doped lutetium oxyorthosilicate (Lu2SiO5:Ce, LSO:Ce) crystal. The light yield and energy resolution were measured using photomultiplier tube (XP5200B PMT) readout. For 662 keV γ-rays (137Cs source), the LYSO:Ce showed the light yield of 39,900ph/MeV, which is higher than that of 35,900ph/MeV obtained for LSO:Ce:Ce. The energy resolution of 8.2% obtained with LYSO:Ce is better than that of 10.6% obtained with LSO:Ce. The non-proportionality of the light yield and energy resolution versus γ-ray energy were measured and the intrinsic resolution of the crystals was calculated. Over the energy range from 16.6 keV to 1274.5 keV, the non-proportionality of about 35% for LYSO:Ce is better than that of about 42% for LSO:Ce. The photofraction was determined for both crystals and compared with the cross-sections ratio calculated using WinXCOM program

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